See detectCongruence(SpecialCubicFourfold) and detectCongruence(SpecialGushelMukaiFourfold).
The object detectCongruence is a method function with options.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/SpecialFanoFourfolds.m2:3349:0.